Table 2: Formulae for recursive calculations, point forecasts, and parametric estimated value on sector by ETS method.

VariablesFormsModels and parameters

AFAFW(M, N, N) , , 
, , , 

IND(A, A, N) , ,
, , , , 
, 

CON(A, A, N) , ,
, , , 

TSP(M, M, N) , ,
, , , , 

WRHC(M, M, N) , ,
, , , , 

OS(A, N, N) ,
, , , , 

HC(M, N, N) , , 
, , , 

TO(A, A, N) , ,
, , , , 

In the above formulae for recursive calculations and point forecasts: denotes the series level at time ; denotes the slope at time ; and are smoothness index; denotes the lag period.